Genus Pyretophorus. 63 



hairs. Wings unspotted and covered with rather broad spindle-shaped 

 scales approximating in shape those of nigerrimus. Venation as in other 

 Anopheles. Transverse veins almost in one line. 



Halteres with light stem and dark brown knob covered with brown 

 scales. 



Legs long and thin, entirely brown, and covered with scales. 



The male of this mosquito differs from all other Anopheles in that the 

 claws on the forelegs are single and uniserrated. There are structural 

 differences too in the larva which differentiate this mosquito from all 

 others. 



Characters of the larva. — Frontal hairs simple and unbranched ; 

 median hairs very close together and long; the external angular 

 very short. The most characteristic and constant feature of this 

 larva is the peculiar structure of the ' basal hair.' In most Ano- 

 pheles this hair is much branched ; in the larva of this species it 

 is made up of a long stalk covered with a few hairs; the extremity 

 appears as if jointed to the stalk, and is somewhat swollen and covered 

 with a corona of fine hairs. The next point in which the larva differs 

 from other Anopheles is that the ■ balancer ' hair on the third abdominal 

 segment is simple and unbranched. A third peculiarity is found in the 

 fact that well-developed palmate hairs are found on all the abdominal 

 segments except the first and last, and there is also a pair on the thorax. 

 The shape of the leaflets of each palmate hair most nearly resembles that 

 of the leaflets of the palmate hairs of the larvae of barbi?*ostris. There is 

 no well defined blade as contrasted with the terminal filament in each 

 leaflet. 



Habitat and observations. — This mosquito was bred from larvae 

 collected near Karwar, in the Bombay Presidency, by Dr. Coghill. 



Note. — Dr. Coghill separated this species from A. aitkeni by its culex- 

 like attitude when at rest. It was confused with the former species." 



Genus PYRETOPHORUS. Blanchard. 



Pyretophorus. Blanchard. C. r. Soc. 



Biol. Paris, n. 23, p. 795 (1902). 

 Howardia. Theobald. Journ. Trop. 



Med., Yol. 5, p. 181 (1902). 



The following are the known species in this genus : — 



1. P. costalis, Loew, Ent. Zeit. Berl., p. 55 (1866) (Africa, Mauritius). 

 Anopheles costalis, Loew, Ent. Zeit. Berl., p. 55 (1866). 

 Anopheles gambiae, Giles, Handb. of Gnats (2 ed.), p. 511 (1902). 

 Anopheles gracilis, Donitz, Beitr. Kenntn. Anoph., p. 76 (1902). 

 var. melas, Theobald, Mono. Culicid. Vol. 3, p. 76 (1903). 



